Slide rail for tightening a transmission

Abstract

A slide rail for tightening a chain has a pivot bearing at one end. A torsion spring is arranged coaxially thereto. The pivot bearing is designed as a slide bearing and is provided with friction disks under initial spring pressure axially, which disks effect a frictional damping of pivotal motion for suppressing vibrations and characteristic disturbances. The slide rail is made in one piece, of synthetic material, and is provided with recesses for the pivot bearing, a torsion spring and frictional dampers.

What is claimed is: 
     
       1. A slide rail assembly for tightening a transmission connecting two drive wheels comprising: a slide rail;   a pivot bearing located near one end of the slide rail, said pivot bearing comprising a frictional damper, said frictional damper capable of pivoting; and   a spring producing pressure against the slide rail.   
     
     
       2. A slide rail according to claim 1 wherein said transmission comprises a chain. 
     
     
       3. A slide rail according to claim 2 wherein said spring comprises a torsion spring mounted outside the periphery of and coaxial with the pivot bearing. 
     
     
       4. A slide rail according to claim 1 wherein said spring comprises a torsion spring mounted outside the periphery of and coaxial with the pivot bearing. 
     
     
       5. A slide rail according to claim 4 wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof into which said pivot bearing and said torsion spring respectively fit. 
     
     
       6. A slide rail according to claim 1 wherein said frictional damper comprises a sliding disk having a frictional surface and a friction disk which abuts said frictional surface. 
     
     
       7. A slide rail according to claim 6 wherein said spring comprises a torsion spring mounted outside the periphery of and coaxial with the pivot bearing. 
     
     
       8. A slide rail according to claim 1 wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof for the accommodation of said pivot bearing and said spring. 
     
     
       9. A slide rail assembly for tightening a transmission connecting two drive wheels comprising: a slide rail;   means for frictionally damping motion of said slide rail; and   means for producing pressure against said slide rail in a direction toward said transmission.   
     
     
       10. The slide rail assembly of claim 9 wherein said means for frictionally damping motion comprises a pivot bearing located near one end of the slide rail, said pivot bearing comprising a frictional damper, said frictional damper capable of pivoting. 
     
     
       11. The slide rail assembly of claim 10 wherein said transmission comprises a chain. 
     
     
       12. A slide rail according to claim 10 wherein said frictional damper comprises a sliding disk having a frictional surface, a friction disk which abuts said frictional surface. 
     
     
       13. A slide rail according to claim 12 wherein said means for producing pressure comprises a torsion spring mounted outside the periphery of and coaxial with the pivot bearing. 
     
     
       14. A slide rail according to claim 10 wherein said means for frictionally damping motion comprises a pivot bearing, said means for producing pressure comprises a torsion spring and wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof for the accommmodation of said pivot bearing and said torsion spring. 
     
     
       15. The slide rail assembly of claim 9 wherein said means for producing pressure against said slide rail in a direction toward said transmission comprises a spring. 
     
     
       16. The slide rail assembly of claim 15 wherein said transmission comprises a chain. 
     
     
       17. A slide rail according to claim 15 wherein said means for frictionally damping motion comprises a pivot bearing, said means for producing pressure comprises a torsion spring and wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof for the accommodation of said pivot bearing and said torsion spring. 
     
     
       18. The slide rail assembly of claim 9 wherein said means for frictionally damping motion comprises a pivot bearing located near one end of the slide rail, said pivot bearing comprising a frictional damper, said frictional damper capable of pivoting and wherein said means for producing pressure against said slide rail in a direction toward said transmission comprises a spring. 
     
     
       19. The slide rail assembly of claim 18 wherein said transmission comprises a chain. 
     
     
       20. A slide rail according to claim 18 wherein said frictional damper comprises a sliding disk having a frictional surface and comprises a friction disk which abuts said frictional surface. 
     
     
       21. A slide rail according to claim 20 wherein said means for producing pressure comprises a torsion spring mounted outside the periphery of and coaxial with the pivot bearing. 
     
     
       22. A slide rail according to claim 18 wherein said means for frictionally damping motion comprises a pivot bearing, said means for producing pressure comprises a torsion spring and wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof for the accommodation of said pivot bearing and said torsion spring. 
     
     
       23. The slide rail assembly of claim 9 wherein said transmission comprises a chain. 
     
     
       24. A slide rail according to claim 9 wherein said means for frictionally damping motion comprises a pivot bearing, said means for producing pressure comprises a torsion spring and wherein the slide rail is an injection-molded element and has a plurality of recesses provided at one end thereof for the accommodation of said pivot bearing and said torsion spring. 
     
     
       25. A slide rail according to claim 9 wherein said frictional damping means provides damping in both directions of movement of the slide rail, toward and away from said transmission.